Will Deacon ae75d9089f locking/qspinlock: Use try_cmpxchg() instead of cmpxchg() when locking ... When reaching the head of an uncontended queue on the qspinlock slow-path, using a try_cmpxchg() instead of a cmpxchg() operation to transition the lock work to _Q_LOCKED_VAL generates slightly better code for x86 and pretty much identical code for arm64. Reported-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Waiman Long <longman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: boqun.feng@gmail.com Cc: linux-arm-kernel@lists.infradead.org Cc: paulmck@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/1524738868-31318-13-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2018-04-27 09:48:52 +02:00
..
lockdep.c
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
locktorture.c
Makefile
mcs_spinlock.h	locking/mcs: Use smp_cond_load_acquire() in MCS spin loop	2018-04-27 09:48:49 +02:00
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
osq_lock.c
percpu-rwsem.c
qrwlock.c
qspinlock.c	locking/qspinlock: Use try_cmpxchg() instead of cmpxchg() when locking	2018-04-27 09:48:52 +02:00
qspinlock_paravirt.h	locking/qspinlock: Remove unbounded cmpxchg() loop from locking slowpath	2018-04-27 09:48:47 +02:00
qspinlock_stat.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem-spinlock.c
rwsem-xadd.c
rwsem.c
rwsem.h
semaphore.c
spinlock.c
spinlock_debug.c
test-ww_mutex.c